Wrench



(No Model.)

` J. P. MITCHELL.

WRENCH.` No. 385,366. Patented July 3, 1888.

UNITED STATES .PATENTy EEICE.

JOSEPH P. MITCHELL, OF NEW BEDFORD, MASSACHUSETTS.

WRENCH.

SPECIFICATION forming pari: of Letters Patent No. 385,366, dated July 3, 1888.

(No model.)

To all whom it may concern:

Be it known that I, JOSEPH P. MITCHELL, a citizen of the United States, residing at New Bedford, in the county of Bristol and State of Massachusetts, have invented a new and useful Improvement in Vrenches. of which the following is a specitication.

My invention relates to certain improvements in wrenches; and it consists in the peculiar construction and arrangement of the several parts, whereby the utmost strength, durability, and usefulness are obtained.

In the accompanying drawings, Figure l is a side View ot my improved wrench. Fig. 2 is a View in longitudinal section of the under jaw of the wrench. Fig. 3 is a side view of the upper jaw of the wrench and its shank. Fig. 4 is a view in longitudinal section of the tube or cylinder, upon the outside of which the handle is secured. Fig. 5 is a view in longitudinal section of Fig. 1. Fig. 6 is a View showing the angular recess in one side of the jaws ot' the wrench, and Fig. 7 is aview ofthe stop which limits the movement of the jaws of the wrench from each other. Figs. 2, 3, 4, and 7 show the detail of construction of Figs. l and 5.

1u Fig. 2, which is a view in longitudinal section ofthe underjaw of the wrench, c represents an angular recess, and s represents a rectangular opening of a size to receive and titthe shank d, Fig.`3. w represents a round opening of a size to receive and tit the outside of thc tube g, Fig. 4. The top ofthe opening w is conntersunk or shouldered, as at i, to correspond with the shoulder h of the tube g, Fig. 4.

in Fig. 3, a is the upperjaw ofthe wrench, d is the squared shank, and e represents a por tion of the shank which is screw-thrcaded and ofa size to tit and engage with theserew thread in the tube g, Fig. 4. The lower end of the shank e is shouldered down to receive the stop k.

`In Fig. 4 the upper part of the tube g is screw-threaded interiorly to r and the remaining portion ofthe interior is enlarged, so as to freely admit the screw-threaded shank e, Fig.l

3. The tube g is also furnished with the holes t, o, and z.

Fig. 5 shows the position and arrangement of the different parts of the wrench when put together.

In putting the parts together the tube g is placed in the under jaw, b, and its shoulder h broughtin contactwiththeshoulderiiuthejaw b, where it is secured by the collar m, placed on the tube g, and fastened there by the pin a. The upper jaw, a, with its shank, is then placed inside the under jaw and the tube g revolved until the threaded portion. e ot' the shank is drawn completely into the tube g, when the stop 7c is secured to the end of the shank. The handle x is then secured on the outside ot' the tube g by means of the pin o, passing througlf the baud 1, the handle, and the tube g. This makes the handle x, tube g, and collar m practically one piece-that is to say, they move together.

In Fig. G is shown a front view ofthe angular recess in thejaws ofthe wrench.

ltwill be observed that the recess in each jaw is composed ot`a double angle-ic.,a right angle and an obtuse angle. This is forgreater convenience in grasping both square and hexagon nuts.

I claiiut In a wrench, the combination of the jaw a, having angular recess c, shank d, exteriorly screw threaded at e and provided with the stop 7c, the jaw b,having angular recess c, rectangular opening s, round opening w, and shoulder fi, the tuheg, having enlarged head or shoulder h and interiorly screwthreaded in a portion of its length, the remaining porlion enlarged to the depth of the screw-thread and provided with the holes t z v, the collar m, adapted to be rigidly secured to the tube g, and the handle m, adapted to be secured to and incluse that portion ot' the tube g which projects below the collar m, all as shown and described.

JOSEPH P. MITCHELL. Witnesses:

ANDREW F. MITCHELL, FRANK J oNEs. 

